Sound amplifier



Oct. 23, 1928. 1,688,817 I F. KUCH SOUND AMPLIFIER Filed June 18, 1926 Inventor.

meow/Ck m/C/Y.

Patented (lot. 23, 1928 steam UNITED STATES PATENT QFFECEH FREDERICK KUOH, OF STRA'IFORD, ONTARIO, CANADA, ASSIGNOR TO THE MGLAGAN FURNITURE COMPANY, LIMITED, OF STRATFORD, ONTARIO, CANADA.

SOUND AMPLIFIER.

Application filed June 18,

The principal objects of the invention are, to increase amplification of sound waves within a device of small compass and to devise a construction of amplifying chamber which will produce an extremely fine quality and volume of tone.

The principal feature of the invention consists in the novel construction and arrangement of divisional amplifying chambers, whereby the sound waves emanatingfrom the reproducer are directed into a chamber where they are divided and the volume is expanded and amplified and directed through a final dispersing horn. V

In the drawings, Figure 1 is a skeleton per spective view of my improved construction of amplifying chamber.

Figure 2 is an enlarged vertical sectional view taken on the line 22 of Figure 3.

Figure 8 is a vertical sectional view on the line 3-3 of Figure 2.

In the present construction the dispersing horn 1 is formed with straight parallel side walls 2 and uniformly diverging top and bottom walls 3 and 1.

The inward end of the top wall 3 is curved to the rear 5 of the horn structure 1 and terminates in a vertical wall 6 the full width of the horn and a parallelly arranged wall 7 is connected to the inward side of the bottom wall 1 of the horn.

The chamber 8 thus formed at the back of the main body of the horn may extend down any desired distance below the back end of the horn chamber.

The bottom of the chamber 8 is formed with convergingly curved end walls 9 which curve upwardly and meet in the centre, thus forming a dividing ridge 10.

Arranged immediately above the ridge 10 is a partition 11 extending horizontally from the top of the inner wall 7 of the chamber 8 and at ioth sides of the partition 11 are arranged verticalpartitions 12 which extend forwardly from the curved wall 23 the two partitions 12 converging forwardly and projecting into the horn and extending from the top to the bottom wall thereof.

An amplifying tube 13 is supported upon the horizontal partition 11 and extends vertically upwardly between the partitions 12 and the sound arm of the instrument in which the amplifying chamber is arranged is attached to the upper end of the tube 13 so that the sound waves are directed vertically down- 1926. Serial No. 116,866:

ward through the tube 13 into the chamber 8.

The sound waves being directed to *ard the ridge 10 from between. the lower ends at the partitions 12 are divided and directed outwardly and upwardly by the curveo siu'faces 9 and striking the curved back wall 5, they are directed forwardly through the throat of the main horn.

In this throat is arranged a transversely disposed triangular-shaped partition 14, the apex of which is spaced intermediate of the height of the throat of the horn and the top and bottom walls are substantially parallel with the top and bottom walls 3 and l of the horn.

The sound waves being thus directed forward from the curved wall?) are divided by the triangular-shaped partition l t and the full expansion of tone andvolumeis achiever.

Very remarkable results have been accom plished with an amplifying chamber constructed in the manner described. The ch amber is very simple to construct. The walls thereof are preferably formed of wood or other suitable vibrant material that will increase the tone and volume of the sound waves and is of such a nature that it may be readily applied to various shapes of cabinets.

What I claim as my invention is 2- 1. A sound amplifier, comprising a chamber formed to divide and divert the sound. waves directed thereinto into separate channels, a dispersing chamber extending latcrally from the aforesaid chambe' iaving divergent walls, and means adapted to di ide the sound waves flowing through each of said channels to the dispersing chamber.

2. A sound amplifier, comprising a chamber formed to divide and divert the sound waves directed thereinto into separate chair nels a dispersing chamber etvtnding laterally from the aforesaid chamber having divergent walls and a division member extending across the throat of the dispersing I from the outer side thereof to and continuous with the upper divergent wall of the dispersing chamber, said right angularly arranged chamber having its end. Walls convergently curving inward and terminating; in a central dividing ridge, means for directing and concentrating the sound Waves againstsaid ridge, means arranged between said latter chamber and said dispersing ClmiHlJLl for effecting a further division of the separate groups of sound waves, and means for directing sound Waves into toe latter chamber directly against said dividing ridge.

4. A sound aii'iplilier, con'iprjising a sound dispersing; chamber horizontally arranged and having con *erging top and bottom W: lls and parallel side walls, a curved extension leading baclm'ardly rein the top wall of said chamber and spaced from the tin-oat thereof, a vertically disposed chamber formed below the throat of said dis icrsingg' chamber and having bottom and side walls curving; out-- Wardly and upwardly fron'i a centrally dividing ridge, a centrally arranged double part tion dividing the upper end of said re'rtieally arranged chamber into two separate sound passages, said partitions extending; from said spaced curved extension :lorwardly into the throat, ineans arranged in said throat for dividing; the sound waves as they pass from said separate passages, and a sound tube arranged between the walls of said double partition and directing sound waves downwardly against the dividing: ridge in the lo Wei.- end of the vertically di .ised c iiainber.

A sound aiiipl i lier, comprising an amplifying tube, a transrerseiv elongated chamber vertically arranged in connection with the discharge end oi the tube and having its bottom wall "formed \vi ih a ridge curring outwardly and upwardly, a pair oi' partitions arranged one at each side oi said sound tube and projecting below the niounth thereof equally at either side of said l'ltl ifP, and dividing the uppe' end of said chamber into two separate sound compartments, :1 sound dispersing chamber having: its throat arranged at the upper side of the aforesaid chamber and receiving the sound Wares from said i eparate sound compartments, and means extending transversely of the throat tor dividing: the sound waves as they pass from said separate coi'z'ipartn'ients into the dispersing chamber.

FREDER GK KUCH. 

